CN109970179B - Magnetic filler taking modified coarse bamboo fiber as carrier and preparation method thereof - Google Patents
Magnetic filler taking modified coarse bamboo fiber as carrier and preparation method thereof Download PDFInfo
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- CN109970179B CN109970179B CN201910208718.2A CN201910208718A CN109970179B CN 109970179 B CN109970179 B CN 109970179B CN 201910208718 A CN201910208718 A CN 201910208718A CN 109970179 B CN109970179 B CN 109970179B
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- C—CHEMISTRY; METALLURGY
- C02—TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE
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- Y02W—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO WASTEWATER TREATMENT OR WASTE MANAGEMENT
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Abstract
The invention discloses a magnetic filler taking modified coarse bamboo fiber as a carrier and a preparation method thereof, which belong to the technical field of sewage treatment and mainly comprise the magnetic filler, a mounting rack, a movable hook, a driving wheel disc and a driven wheel disc, the magnetic fillers are multiple, each magnetic filler comprises a modified coarse bamboo fiber net and magnetic activated particles, the magnetic activation particles are embedded in pores of the modified coarse bamboo fiber net through a counter-impact reaction to form a three-dimensional net structure taking the modified coarse bamboo fibers as a carrier, a conical head is arranged on one side of the driving wheel disc, the hammer-shaped head and the driving wheel disc are integrally formed, the inner part of the magnetic packing box is a cavity, the outer end of the conical head is movably connected with the movable hook through a bearing, the magnetic packing is transversely arranged on the mounting frame, the driving wheel disc and the movable hook can rotate, and the driving wheel disc and the driven wheel disc are respectively used for fixing one end of the magnetic packing. In a word, the magnetic filler is simple and convenient to install, uniform in film hanging and suitable for large-scale popularization.
Description
Technical Field
The invention relates to a magnetic filler taking modified coarse bamboo fibers as a carrier and a preparation method thereof, belonging to the technical field of sewage treatment.
Background
The filler has wide application in water treatment, and plays an important role in aerobic, facultative or anaerobic processes. The filler can be roughly divided into several types such as fixed type, suspension type, dispersion type and novel biological filler, each filler has the advantages and disadvantages of the filler, so that the development of the application of biological affinity hydrophilic activity and magnetic effect of the magnetic filler in the biological degradation of the wastewater can be expected to greatly improve the biological degradation efficiency of the wastewater through the continuous improvement and improvement of research and development: on the research of the ceramsite water treatment filler, the performances such as specific surface area, strength and the like are greatly improved.
The function of the filler in the sewage treatment biomembrane process is mainly embodied in the following aspects:
(1) as a place where microorganisms inhabit and grow and propagate, the filler is added to create a more favorable living environment for the growth and propagation of the microorganisms, maintain higher biomass and enrich the biological phase;
(2) in the aerobic biomembrane process, the filler plays a role in cutting and blocking air bubbles, so that the retention time of the bubbles and the gas/liquid contact area can be increased, the oxygen transfer rate is increased, the mass transfer effect is enhanced, and the oxygen utilization rate is improved, thereby reducing the aeration rate and saving the energy consumption;
(3) in the fixed bed biomembrane reactor, the filler plays a role in adsorbing and intercepting suspended matters in the sewage, and reduces the concentration of the suspended matters in the effluent of the reactor;
(4) as a place where the biomembrane in the biomembrane reactor contacts with the wastewater, the filler has a certain mixing effect on the water flow, thereby promoting the uniform distribution of the wastewater in the reactor.
Therefore, the filler is one of the key technologies of the biofilm process, and the performance of the filler is directly related to the treatment effect and the operation cost of the whole sewage treatment system. How to get out of artificial chemical organic materials, starting from the angle of selecting natural materials, the novel filler is developed, so that the technical performances of the novel filler such as specific surface area, strength, water distribution and gas distribution are comparable to those of the conventional organic filler, the novel filler has obvious competitive advantages in the aspects of production cost and microbial affinity, and the novel filler is always a hot point concerned by a plurality of experts and scholars and is also a great technical difficulty for the research and development of the novel filler.
Disclosure of Invention
In order to solve the technical problems, the invention provides a magnetic filler taking modified coarse bamboo fibers as a carrier and a preparation method thereof.
The technical scheme of the invention is as follows: the utility model provides an use magnetic packing of thick bamboo fibre of modification as carrier mainly includes magnetic packing, mounting bracket, activity couple, driving wheel dish, follows the driving wheel dish, magnetic packing has a plurality ofly, and every magnetic packing includes thick bamboo fiber net of modification and magnetic activation granule, the magnetic activation granule is inlayed in thick bamboo fiber net hole of modification through the offset reaction, forms the three-dimensional network structure who uses thick bamboo fibre of modification as the carrier, the mounting bracket has two, and its two mounting brackets set up relatively, and every mounting bracket includes sleeve and lifter, the lifter runs through respectively and sets up inside the sleeve, sleeve bottom one side is equipped with lifting nut, be equipped with a plurality of installation on the mounting bracket and detain the one-to-one connection, be equipped with the fixed orifices on driving wheel dish and the driven wheel dish respectively, and pass through the nut between the fixed orifices and fix, the magnetic packing device is characterized in that a conical head is arranged on one side of the driving wheel disc, the conical head and the driving wheel disc are integrally formed, a cavity is formed inside the conical head, the outer end of the conical head is movably connected with the movable hook through a bearing, magnetic packing is transversely arranged on the mounting frame, the driving wheel disc and the movable hook can rotate with each other, and the driving wheel disc and one end of the driven wheel disc, which is used for fixing the magnetic packing, are respectively.
Further, the preparation method of the modified coarse bamboo fiber web comprises the following steps:
s1: selecting moso bamboos of 3-5 years old, crushing and grinding to prepare bamboo pulp;
s2: placing the bamboo pulp in a water tank, adding the bamboo pulp into the improved liquid for repeated soaking and cleaning, and radiating the mixture by using an ultrasonic radiator, wherein the radiation time is 30-40min, the frequency of the ultrasonic radiator is 60-70 Hz, the toughness and the mechanical strength of the bamboo fiber are enhanced, and the bamboo fiber is prevented from being rotten after being soaked in water for a long time.
S3: taking out the radiated bamboo pulp, immediately putting the bamboo pulp into saline water for boiling and softening, wherein the percentage concentration of the saline water is 45-60%, the temperature is 60-80 ℃, the boiling time is 3-5h, then unpacking and fully loosening the fibers, repeatedly folding and stretching to obtain a modified coarse bamboo fiber net, improving the toughness of the bamboo fibers through boiling, and then repeatedly folding and stretching to enhance the specific surface area of the bamboo fibers.
Further, the preparation method of the magnetic activated particles comprises the following steps:
s1: preparing the biochar: carbonizing straw fiber or wheat fiber for 2-6h under inert gas at a temperature rising speed of 10 deg.C/min-20 deg.C/min and a temperature of 300 deg.C-600 deg.C to obtain charcoal;
s2: adding the biochar into a mixed solution of concentrated sulfuric acid and concentrated nitric acid, and soaking for 5-8 hours to obtain modified biochar;
s3: mixing a dispersing agent, magnetic nanoparticles, a surfactant and chitosan according to a mass ratio of 0.05:2:1:1, dissolving the mixture in an organic solvent with a volume 2 times that of the mixture, heating to 60-80 ℃, keeping for 1-2h, and then placing in a Gauss magnetic field of 3000-4000 for activation to obtain a magnetic mother solution; wherein the dispersant is sodium dodecyl sulfate or poor saponin, and the magnetic nanoparticles are ferroferric oxide nanoparticles with ferromagnetism or paramagnetism; the surfactant is a long-chain surfactant containing fluorocarbon groups; the organic solvent is one of N, N-dimethylformamide, dimethyl sulfoxide, gamma-butyrolactone and N, N-dimethylacetamide.
S4: mixing the modified biochar in a proportion of 1 g: soaking 3-5ml of the magnetic mother liquor in a mass-volume ratio, ultrasonically stirring for 1-2h, washing for 2-3 times by using distilled water, repeatedly soaking and washing for 3-5 times, filtering, and drying to obtain magnetically activated particles;
further, the preparation method of the magnetic filler comprises the following steps: s1: respectively applying reverse magnetic force to the magnetic activation particles and the modified coarse bamboo fibers, carrying out hedging reaction on the magnetic activation particles and the modified coarse bamboo fibers by electromagnetic force, and loading the magnetic activation particles on the surface of the modified coarse bamboo fiber net to obtain a semi-finished product; s2: and cleaning the semi-finished product, and removing unreacted magnetic activation particles to obtain the magnetic filler.
Furthermore, the load rate of the magnetic activation particles on the surface of the modified coarse bamboo fiber net is 80-95%, the number of the magnetic activation particles is ensured to be the maximum value, the specific surface area of the magnetic filler is maximized, and the amount of microorganisms attached in unit area is maximized.
Furthermore, the magnetic filler is cylindrical, the diameter of the magnetic filler is 60-120mm, and the surface of the magnetic filler forms rhombic meshes according to the warps and the wefts and can be detached and replaced.
Further, the improved liquid comprises the following components in percentage by volume: 2-6% of a toughening agent, 0.3-0.5% of a phase solvent, 9-12% of a water-soluble lubricating liquid, 20-35% of polyvinylidene fluoride, 10-15% of an amide solvent and the balance of an ethanol solution, wherein the toughening agent is diethyl phthalate; the phase solvent is maleic anhydride modified vinyl resin or ethylene-vinyl acetate copolymer; the water-soluble lubricating liquid is chitosan type lubricating liquid.
The working method of the invention is as follows: when the magnetic filler is installed, the height of the lifting rod which is arranged oppositely is adjusted to a proper position, two ends of the magnetic filler are clamped through the driving wheel disc and the driven wheel disc respectively, the magnetic filler is fixed with the nut through the fixing holes in the driving wheel disc and the driven wheel disc, one end of the movable hook is movably connected with the conical head through the bearing, and the other end of the movable hook is connected with the installation buckle on the lifting rod in a one-to-one correspondence mode.
Compared with the prior art, the invention has the beneficial effects that: according to the magnetic filler prepared by the invention, the magnetic activation particles are embedded on the modified coarse bamboo fibers, 1) the contact area of the magnetic filler and sewage is increased, and 2) the mechanical strength of the modified coarse bamboo fiber net is improved by the magnetic activation particles; 3) the magnetic activated particles accelerate the biofilm formation process; the driving wheel disc and the driven wheel disc support the magnetic filler, the external shape of the magnetic filler is enlarged, the filler has a larger specific surface area, and meanwhile, the driving wheel disc and the driven wheel disc can rotate under the impact of water flow, so that the contact area of the magnetic filler and sewage is larger, and the film hanging is more uniform; the invention has the advantages of large specific surface area and high sewage treatment efficiency, and is suitable for mass popularization.
Drawings
Fig. 1 is a schematic structural view of the present invention.
The device comprises a magnetic filler, a mounting frame, a sleeve, a lifting rod, a lifting nut, a mounting buckle, a movable hook, a driving wheel disc, a driven wheel disc, a modified coarse bamboo fiber net, magnetic activated particles, fixing holes, a conical head, a bearing and a nut, wherein the magnetic filler is 1-2-the mounting frame, the sleeve is 21-the lifting rod is 22-the lifting nut is 23-the mounting buckle is 3-the movable hook is 5-the driving wheel disc, the driven wheel disc is 6-the modified coarse bamboo fiber net, the magnetic activated particles are 8-the fixing holes are 9-the conical head is 10-the bearing and the nut is 12-the bearing.
Detailed Description
Example 1: as shown in fig. 1, a magnetic filler using modified coarse bamboo fiber as a carrier mainly comprises a magnetic filler 1, a mounting rack 2, a movable hook 4, a driving wheel disk 5 and a driven wheel disk 6, wherein a plurality of magnetic fillers 1 are provided, the magnetic filler 1 is cylindrical, the diameter of the magnetic filler is 60mm, the surface of the magnetic filler forms rhombic meshes according to warps and wefts, each magnetic filler 1 comprises a modified coarse bamboo fiber net 7 and magnetic activation particles 8, the magnetic activation particles 8 are embedded in the pores of the modified coarse bamboo fiber net 7 through a hedging reaction to form a three-dimensional net structure using the modified coarse bamboo fiber as the carrier, two mounting racks 2 are arranged oppositely, each mounting rack 2 comprises a sleeve 21 and a lifting rod 22, the lifting rod 22 is respectively arranged inside the sleeve 21 in a penetrating manner, a lifting nut 23 is arranged on one side of the bottom of the sleeve 21, a plurality of mounting buckles 3 are arranged on the mounting rack 2, 3 one-to-one is connected with the installation to activity couple 4, be equipped with fixed orifices 9 on action wheel dish 5 and the follow driving wheel dish 6 respectively, and it is fixed through nut 12 between the fixed orifices 9, 5 one side of initiative rim plate is equipped with conical head 10, conical head 10 and 5 integrated into one piece of action wheel dish, and inside be the cavity, the outer end and the activity couple 4 of conical head 10 pass through bearing 11 swing joint, magnetic packing 1 transversely sets up on mounting bracket 2, can rotate between action wheel dish 5 and the activity couple 4, the one end of magnetic packing is fixed respectively to initiative rim plate 5 and the follow driving wheel dish 6, rivers drive initiative rim plate 5 and when rotating from driving wheel dish 6, can make magnetic packing 1 rotate together, the area of contact of rivers and magnetic packing 1 has been increased.
The preparation method of the modified coarse bamboo fiber net 7 comprises the following steps:
s1: selecting moso bamboos of 3 years old to be crushed and rolled to prepare bamboo pulp;
s2: placing the bamboo pulp in a water tank, adding the bamboo pulp into an improved liquid for repeated soaking and cleaning, and radiating the mixture by using an ultrasonic radiator, wherein the radiation time is 30min, the frequency of the ultrasonic radiator is 70Hz, and the improved liquid comprises the following components in percentage by volume: 2% of toughening agent, 0.3% of phase solvent, 9% of water-soluble lubricating liquid, 20% of polyvinylidene fluoride, 10% of amide solvent and the balance of ethanol solution, wherein the toughening agent is diethyl phthalate; the phase solvent is maleic anhydride modified vinyl resin or ethylene-vinyl acetate copolymer; the water-soluble lubricating liquid is chitosan type lubricating liquid, and the toughness and the mechanical strength of the bamboo fiber are enhanced;
s3: taking out the radiated bamboo pulp, immediately putting the bamboo pulp into saline water for boiling and softening, wherein the percentage concentration of the saline water is 45%, the temperature is 60 ℃, the boiling time is 3h, then unpacking and fully loosening the fibers, repeatedly folding and stretching to obtain a modified coarse bamboo fiber net 7, improving the toughness of the bamboo fibers through boiling, and then repeatedly folding and stretching to enhance the specific surface area of the bamboo fibers.
The preparation method of the magnetic activated particles comprises the following steps:
s1: preparing the biochar: carbonizing the straw fiber or the wheat fiber for 2 hours under inert gas, wherein the temperature rising speed is 10 ℃/min, and the temperature is 30 ℃, so as to obtain biochar;
s2: adding biochar into a mixed solution of concentrated sulfuric acid and concentrated nitric acid, and soaking for 5 hours to obtain modified biochar;
s3: mixing a dispersing agent, magnetic nanoparticles, a surfactant and chitosan according to a mass ratio of 0.05:2:1:1, dissolving the mixture in an organic solvent with a volume 2 times that of the mixture, heating to 60 ℃, keeping for 1h, and then placing in a 3000 Gauss magnetic field for activation to obtain a magnetic mother liquor; wherein the dispersant is sodium dodecyl sulfate or poor saponin, and the magnetic nanoparticles are ferroferric oxide nanoparticles with ferromagnetism or paramagnetism; the surfactant is a long-chain surfactant containing fluorocarbon groups; the organic solvent is one of N, N-dimethylformamide, dimethyl sulfoxide, gamma-butyrolactone and N, N-dimethylacetamide;
s4: mixing the modified biochar in a proportion of 1 g: soaking 3ml of magnetic mother liquor in a mass-volume ratio, ultrasonically stirring for 1h, washing for 2 times by using distilled water, repeatedly soaking and washing for 3 times, filtering, and drying to obtain magnetic activated particles;
the preparation method of the magnetic filler 1 comprises the following steps: s1: respectively applying reverse magnetic force to the magnetic activation particles 8 and the modified coarse bamboo fibers, carrying out hedging reaction on the magnetic activation particles 8 and the modified coarse bamboo fibers through electromagnetic force, loading the magnetic activation particles 8 on the surface of the modified coarse bamboo fiber net 7 to obtain a semi-finished product, wherein the loading rate of the magnetic activation particles 8 on the surface of the modified coarse bamboo fiber net 7 is 80%; s2: and cleaning the semi-finished product, and removing unreacted magnetic activation particles 8 to obtain the magnetic filler.
Example 2: as shown in figure 1, the magnetic filler with modified coarse bamboo fibers as carriers mainly comprises a plurality of magnetic fillers 1, a mounting rack 2, a movable hook 4, a driving wheel disc 5 and a driven wheel disc 6, wherein the magnetic fillers 1 are cylindrical, the diameter of the magnetic fillers is 120mm, and rhombic meshes are formed on the surfaces of the magnetic fillers according to warps and wefts. Each magnetic filler 1 comprises a modified thick bamboo fiber net 7 and magnetic activation particles 8, the magnetic activation particles 8 are embedded in the pores of the modified thick bamboo fiber net 7 through a hedging reaction to form a three-dimensional net structure taking modified thick bamboo fibers as a carrier, two mounting frames 2 are provided, the two mounting frames 2 are arranged oppositely, each mounting frame 2 comprises a sleeve 21 and a lifting rod 22, the lifting rod 22 is respectively arranged in the sleeve 21 in a penetrating manner, one side of the bottom of the sleeve 21 is provided with a lifting nut 23, the mounting frame 2 is provided with a plurality of mounting buckles 3, the movable hooks 4 are connected with the mounting buckles 3 in a one-to-one correspondence manner, the driving wheel disc 5 and the driven wheel disc 6 are respectively provided with fixing holes 9, the fixing holes 9 are fixed through nuts 12, one side of the driving wheel disc 5 is provided with a conical head 10, the conical head 10 is integrally formed with the driving wheel disc 5, the inner part of the conical head is a cavity, the outer end of the conical head 10 is movably connected with the movable hooks 4 through a bearing 11, magnetic packing 1 transversely sets up on mounting bracket 2, can rotate between action wheel dish 5 and the activity couple 4, and the one end of magnetic packing is fixed respectively to initiative rim plate 5 and follow rim plate 6.
The preparation method of the modified coarse bamboo fiber net 7 comprises the following steps:
s1: selecting moso bamboos of 3-5 years old, crushing and grinding to prepare bamboo pulp;
s2: placing the bamboo pulp in a water tank, adding the bamboo pulp into an improved liquid for repeated soaking and cleaning, and radiating the mixture by using an ultrasonic radiator, wherein the radiation time is 40min, the frequency of the ultrasonic radiator is 70Hz, and the improved liquid comprises the following components in percentage by volume: 6% of toughening agent, 0.5% of compatilizer, 12% of water-soluble lubricating liquid, 35% of polyvinylidene fluoride, 15% of amide solvent and the balance of ethanol solution, so that the toughness and the mechanical strength of the bamboo fiber are improved, wherein the toughening agent is diethyl phthalate; the compatilizer is maleic anhydride modified vinyl resin or ethylene-vinyl acetate copolymer; the water-soluble lubricating liquid is chitosan type lubricating liquid;
s3: taking out the radiated bamboo pulp, immediately putting the bamboo pulp into saline water for boiling and softening, wherein the percentage concentration of the saline water is 60%, the temperature is 80 ℃, the boiling time is 5 hours, then unpacking and fully loosening the fibers, repeatedly folding and stretching to obtain a modified coarse bamboo fiber net 7, improving the toughness of the bamboo fibers through boiling, and then repeatedly folding and stretching to enhance the specific surface area of the bamboo fibers.
The preparation method of the magnetic activated particles comprises the following steps:
s1: preparing the biochar: carbonizing straw fiber or wheat fiber for 6h under inert gas at a temperature rising speed of 20-DEG C/min and a temperature of 600 ℃ to obtain biochar;
s2: adding biochar into a mixed solution of concentrated sulfuric acid and concentrated nitric acid, and soaking for 8 hours to obtain modified biochar;
s3: mixing a dispersing agent, magnetic nanoparticles, a surfactant and chitosan according to a mass ratio of 0.05:2:1:1, dissolving the mixture in an organic solvent with a volume 2 times that of the mixture, heating to 80 ℃, keeping for 2 hours, and then placing in a Gauss magnetic field of 4000 for activation to obtain a magnetic mother liquor; wherein the dispersant is sodium dodecyl sulfate or poor saponin, and the magnetic nanoparticles are ferroferric oxide nanoparticles with ferromagnetism or paramagnetism; the surfactant is a long-chain surfactant containing fluorocarbon groups; the organic solvent is one of N, N-dimethylformamide, dimethyl sulfoxide, gamma-butyrolactone and N, N-dimethylacetamide;
s4: mixing the modified biochar in a proportion of 1 g: soaking 5ml of the magnetic mother liquor in a mass-volume ratio, ultrasonically stirring for 2 hours, washing for 3 times by using distilled water, repeatedly soaking and washing for 5 times, filtering, and drying to obtain magnetic activated particles;
the preparation method of the magnetic filler 1 comprises the following steps: s1: respectively applying reverse magnetic force to the magnetic activation particles 8 and the modified coarse bamboo fibers, carrying out hedging reaction on the magnetic activation particles 8 and the modified coarse bamboo fibers through electromagnetic force, loading the magnetic activation particles 8 on the surface of the modified coarse bamboo fiber net 7 to obtain a semi-finished product, wherein the loading rate of the magnetic activation particles 8 on the surface of the modified coarse bamboo fiber net 7 is 95%; s2: and cleaning the semi-finished product, and removing unreacted magnetic activation particles 8 to obtain the magnetic filler.
Example 3: as shown in fig. 1, a magnetic filler using modified coarse bamboo fiber as a carrier mainly comprises a magnetic filler 1, a mounting rack 2, a movable hook 4, a driving wheel disk 5 and a driven wheel disk 6, wherein a plurality of magnetic fillers 1 are provided, the magnetic filler 1 is cylindrical, the diameter of the magnetic filler is 90mm, the surface of the magnetic filler forms rhombic meshes according to warps and wefts, each magnetic filler 1 comprises a modified coarse bamboo fiber net 7 and magnetic activation particles 8, the magnetic activation particles 8 are embedded in the pores of the modified coarse bamboo fiber net 7 through a hedging reaction to form a three-dimensional net structure using the modified coarse bamboo fiber as the carrier, two mounting racks 2 are arranged oppositely, each mounting rack 2 comprises a sleeve 21 and a lifting rod 22, the lifting rod 22 is respectively arranged inside the sleeve 21 in a penetrating manner, a lifting nut 23 is arranged on one side of the bottom of the sleeve 21, a plurality of mounting buckles 3 are arranged on the mounting rack 2, 3 one-to-one is buckled with the installation and is connected to activity couple 4, be equipped with fixed orifices 9 on action wheel dish 5 and the driven wheel dish 6 respectively, and it is fixed through nut 12 between the fixed orifices 9, 5 one side of initiative wheel dish is equipped with conical head 10, conical head 10 and 5 integrated into one piece of action wheel dish, and inside be the cavity, the outer end and the activity couple 4 of conical head 10 pass through bearing 11 swing joint, magnetic packing 1 transversely sets up on mounting bracket 2, can rotate between action wheel dish 5 and the activity couple 4, the one end of magnetic packing is fixed respectively to initiative wheel dish 5 and driven wheel dish 6.
The preparation method of the modified coarse bamboo fiber net 7 comprises the following steps:
s1: selecting moso bamboos with the age of 4 years, crushing and grinding to prepare bamboo pulp;
s2: placing the bamboo pulp in a water tank, adding the bamboo pulp into an improved liquid for repeated soaking and cleaning, and radiating the mixture by using an ultrasonic radiator, wherein the radiation time is 35min, the frequency of the ultrasonic radiator is 65Hz, and the improved liquid comprises the following components in percentage by volume: 4% of toughening agent, 0.4% of compatilizer, 11% of water-soluble lubricating liquid, 36% of polyvinylidene fluoride, 13% of amide solvent and the balance of ethanol solution, so that the toughness and the mechanical strength of the bamboo fiber are improved; wherein the toughening agent is diethyl phthalate; the compatilizer is maleic anhydride modified vinyl resin or ethylene-vinyl acetate copolymer; the water-soluble lubricating liquid is chitosan type lubricating liquid;
s3: taking out the radiated bamboo pulp, immediately putting the bamboo pulp into saline water for boiling and softening, wherein the percentage concentration of the saline water is 55%, the temperature is 70 ℃, the boiling time is 4 hours, then unpacking and fully loosening the fibers, repeatedly folding and stretching to obtain a modified coarse bamboo fiber net 7, improving the toughness of the bamboo fibers through boiling, and then repeatedly folding and stretching to enhance the specific surface area of the bamboo fibers.
The preparation method of the magnetic activated particles comprises the following steps:
s1: preparing the biochar: carbonizing the straw fiber or the wheat fiber for 4 hours under inert gas, wherein the temperature rising speed is 15 ℃/min, and the temperature is 450 ℃, so as to obtain biochar;
s2: adding the biochar into a mixed solution of concentrated sulfuric acid and concentrated nitric acid, and soaking for 6.5 hours to obtain modified biochar;
s3: mixing a dispersing agent, magnetic nanoparticles, a surfactant and chitosan according to a mass ratio of 0.05:2:1:1, dissolving the mixture in an organic solvent with a volume 2 times that of the mixture, heating to 70 ℃, keeping for 1.5h, and then placing in a Gauss magnetic field of 3500 for activation to obtain a magnetic mother solution; wherein the dispersant is sodium dodecyl sulfate or poor saponin, and the magnetic nanoparticles are ferroferric oxide nanoparticles with ferromagnetism or paramagnetism; the surfactant is a long-chain surfactant containing fluorocarbon groups; the organic solvent is one of N, N-dimethylformamide, dimethyl sulfoxide, gamma-butyrolactone and N, N-dimethylacetamide;
s4: mixing the modified biochar in a proportion of 1 g: soaking 4ml of the magnetic mother solution in a mass-volume ratio, ultrasonically stirring for 1.5h, washing for 2 times by using distilled water, repeatedly soaking and washing for 4 times, filtering, and drying to obtain magnetic activated particles;
the preparation method of the magnetic filler 1 comprises the following steps: s1: respectively applying reverse magnetic force to the magnetic activation particles 8 and the modified coarse bamboo fibers, carrying out hedging reaction on the magnetic activation particles 8 and the modified coarse bamboo fibers through electromagnetic force, loading the magnetic activation particles 8 on the surface of the modified coarse bamboo fiber net 7 to obtain a semi-finished product, wherein the loading rate of the magnetic activation particles 8 on the surface of the modified coarse bamboo fiber net 7 is 87%; s2: and cleaning the semi-finished product, and removing unreacted magnetic activation particles 8 to obtain the magnetic filler.
The working method of the invention comprises the following steps: when installing magnetic packing, adjust the high suitable position of lifter 22 of relative setting, press from both sides tightly 1 both ends of magnetic packing through initiative rim plate 5 and follow rim plate 6 respectively to fixed orifices 9 and nut 12 on through initiative rim plate 5 and follow rim plate 6 are fixed, and 4 one ends of activity couple are passed through bearing 11 and conical head 10 swing joint, and the other end is buckled 3 one-to-one with the installation on the lifter 22 respectively and is connected.
Finally, it should be noted that: the above examples are only intended to illustrate the technical solution of the present invention, but not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions of the embodiments of the present invention.
Claims (2)
1. The magnetic filler taking modified coarse bamboo fibers as a carrier is characterized by mainly comprising a plurality of magnetic fillers (1), a mounting rack (2), a movable hook (4), a driving wheel disc (5) and a driven wheel disc (6), wherein each magnetic filler (1) comprises a modified coarse bamboo fiber net (7) and magnetic activation particles (8), the magnetic activation particles (8) are embedded in pores of the modified coarse bamboo fiber net (7) through hedging reaction to form a three-dimensional net structure taking the modified coarse bamboo fibers as the carrier, the magnetic fillers (1) are cylindrical, the diameter of the magnetic fillers is 60-120mm, and the surfaces of the magnetic fillers form rhombic meshes according to warps and wefts; the utility model discloses a bearing, including mounting bracket (2), lifter (22), movable hook (3), driving wheel dish (5), driving wheel dish (6), driving wheel dish (10), cone head (10) and driving wheel dish (5) integrated into one piece, and inside be the cavity, the outer end and the movable hook (4) of cone head (10) pass through bearing (11) swing joint, the magnetic packing (1) is transversely arranged on the mounting rack (2), the driving wheel disc (5) and the movable hook (4) can rotate, and one end of the magnetic packing is respectively fixed on the driving wheel disc (5) and the driven wheel disc (6);
the load rate of the magnetic activation particles (8) on the surface of the modified coarse bamboo fiber net (7) is 80-95%;
the preparation method of the modified coarse bamboo fiber net (7) comprises the following steps:
s1: selecting moso bamboos of 3-5 years old, crushing and grinding to prepare bamboo pulp;
s2: placing the bamboo pulp in a water tank, adding the bamboo pulp into the improved liquid for repeated soaking and cleaning, and radiating the mixture by using an ultrasonic radiator, wherein the radiation time is 30-40min, and the frequency of the ultrasonic radiator is 60-70 Hz; the improved liquid comprises the following components in percentage by volume: 2-6% of a toughening agent, 0.3-0.5% of a phase solvent, 9-12% of a water-soluble lubricating liquid, 20-35% of polyvinylidene fluoride, 10-15% of an amide solvent and the balance of an ethanol solution, wherein the toughening agent is diethyl phthalate; the phase solvent is maleic anhydride modified vinyl resin or ethylene-vinyl acetate copolymer; the water-soluble lubricating liquid is chitosan type lubricating liquid;
s3: taking out the radiated bamboo pulp, immediately putting the bamboo pulp into saline water for boiling and softening, wherein the mass percentage concentration of the saline water is 45-60%, the temperature is 60-80 ℃, the boiling time is 3-5h, then unpacking and fully loosening the fibers, and repeatedly folding and stretching to obtain the modified coarse bamboo fiber net (7).
2. The magnetic filler using the modified coarse bamboo fiber as the carrier according to claim 1, wherein the preparation method of the magnetic activated particles comprises the following steps:
s1: preparing the biochar: carbonizing straw fiber or wheat fiber for 2-6h under inert gas at a temperature rising speed of 10-20 ℃/min and a temperature of 300-600 ℃ to obtain charcoal;
s2: adding the biochar into a mixed solution of concentrated sulfuric acid and concentrated nitric acid, and soaking for 5-8 hours to obtain modified biochar;
s3: mixing a dispersing agent, magnetic nanoparticles, a surfactant and chitosan according to a mass ratio of 3:2:1:1, dissolving the mixture in an organic solvent with a volume 2 times that of the mixture, heating to 60-80 ℃, keeping for 1-2h, and then placing in a Gauss magnetic field of 3000-4000 for activation to obtain a magnetic mother solution: wherein the dispersant is sodium dodecyl sulfate or poor saponin, and the magnetic nanoparticles are ferroferric oxide nanoparticles with ferromagnetism or paramagnetism; the surfactant is a long-chain surfactant containing fluorocarbon groups; the organic solvent is one of N, N-dimethylformamide, dimethyl sulfoxide, gamma-butyrolactone and N, N-dimethylacetamide;
s4: mixing the modified biochar in a proportion of 1 g: soaking 3-5ml of the magnetic mother liquor in a mass-volume ratio, ultrasonically stirring for 1-2h, washing with distilled water for 2-3 times, repeatedly soaking and washing for 3-5 times, filtering, and drying to obtain the magnetic activated particles.
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